Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thanh xa » thanh ha, thanh va, thanh ba
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ve nam » he nam, va nam, le nam
lam ha » dam ha, lam chat, lam thay
nam ha » nam a, nam da, nam khoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thi thanh xa hoi. hieu ve nam thuc va hanh ((lam ha) or (((nam ha) OR (nam va)))) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thi thanh xa hoi. hieu ve nam thuc va hanh ((lam ha) OR (((nam ha) OR (nam va)))) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thi thanh xa hoi. hieu ve nam thuc va hanh ((lam ha) or (((nam ha) OR (nam va)))) triet*".